CCA Proxy Re-Encryption without Bilinear Maps in the Standard ModelToshihide Matsuda, Ryo Nishimaki, Keisuke TanakaPKC 2010 (LNCS 6056)Subsequent to the publication of the above work, it was pointed out that the security proof is incorrect. See "On the Security of a Bidirectional Proxy Re-encryption Scheme from PKC 2010" in PKC 2011 for details.